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Re: poor io performance with xfs+raid5

To: Justin Coffey <justin@xxxxxxxxx>
Subject: Re: poor io performance with xfs+raid5
From: Steve Lord <lord@xxxxxxx>
Date: 25 Apr 2002 14:28:16 -0500
Cc: Mike Eldridge <diz@xxxxxxxxx>, linux-xfs@xxxxxxxxxxx
In-reply-to: <Pine.BSO.4.44.0204251220310.25324-100000@paperboy.websocietyinc.com>
References: <Pine.BSO.4.44.0204251220310.25324-100000@paperboy.websocietyinc.com>
Sender: owner-linux-xfs@xxxxxxxxxxx
On Thu, 2002-04-25 at 14:22, Justin Coffey wrote:
> 
> > The alignment issue is mostly software raid5 specific. The ability to
> > better align the writes will help on other configs to a lesser extent.
> 
> Thanks.  We're in the design phase of a new product and it's likely to use
> some sort of largish NAS box.  Most likely raid 5'ed.  Initially (due to
> cost) we'll probably do software raid but we'll want to move to hardware
> level at some point.  I guess that means ReiserFS for us for now?

Depends when you need the performance speed up... I can send you code
now, it works most of the time, I just have a couple of anomalies to
chase.

Steve

> 
> ------------------------------------------------------------------------
> Justin Coffey                                      858.535.9332 x 2025
> Technical Advisor                                     justin@xxxxxxxxx
> Homes.com, Inc.                                               http://homes.com
> ------------------------------------------------------------------------
-- 

Steve Lord                                      voice: +1-651-683-3511
Principal Engineer, Filesystem Software         email: lord@xxxxxxx


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